Eumeralla Formation: Lower Cretaceous Volcaniclastic Sedimentary Units in the Otway Basin

A geological study of the Early Cretaceous Eumeralla Formation in the Otway Basin, southern Australia. Wireline-log analysis and sedimentary data discriminate three major basin-wide informal lithostratigraphic units, with a fourth unit present in the western basin. The Australian Ocean Data Network published this analysis, last updated on 2026-04-10.

Use Cases

• Modeling rift basin depositional environments based on described lithostratigraphic units (Eumeralla I-IV).
• Correlating sedimentary facies with Aptian-Albian sea-level changes as mentioned in the description.
• Analyzing the influence of intrabasinal volcanism on sedimentation and drainage patterns.
• Interpreting paleoenvironments (coal swamps, flood plains, lakes, channel tracts) from the described unit succession.

Strengths

• Analysis discriminates three major basin-wide lithostratigraphic units, with a fourth unit described for the western basin.
• Interpretations are supported by sedimentary facies analysis of outcropping Eumeralla II and Eumeralla III.
• The study correlates lithology and depositional environment variations with Aptian-Albian sea-level changes.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data is presented as a PDF/HTML study; primary tabular or geospatial data files are not specified.

Provenance

Source

Australian Ocean Data Network

Collection Method

Wireline-log analysis and sedimentary facies analysis of outcrops.

Time Range

Early Cretaceous (Aptian-Albian)

Freshness

Last updated 2026-04-10 19:46:24.264611; freshness should be verified.

Geography

Otway Basin, southern Australia